gawk - replace first occurrence of text using awk -

the code below replaces first occurrence of apple banana. how achieve same using awk / gawk?

sed -i "0,/apple/s//banana/" myfile.txt 

this come with:

awk '!x{x=sub("apple","banana")}7' file 

for example:

kent$  cat f foo apple foo apple apple  kent$  awk '!x{x=sub("apple","banana")}7' f foo banana foo apple apple 

for sed -i (change in place) part, if use gawk 4.1.0, have option too. otherwise, have use temp file.